Packet 12: Bonus 11
The QuEChERS (“catchers”) method employs dispersive solid phase extraction and a sorbent mix containing magnesium sulfate to isolate these compounds before cleanup. For 10 points each:
[10m] Name these bioactive compounds, classes of which include organochlorines, pyrethroids, and carbamates. Imidacloprid is part of a class of these compounds called neonicotinoids.
ANSWER: pesticides [accept biocides or herbicides or insecticides or fungicides]
[10h] Due to its broad separation range, this water-soluble compound is selected as the organic phase in QuEChERS extraction. Samples are usually dissolved in water and methanol or this compound during reverse-phase HPLC.
ANSWER: acetonitrile [or ACN; accept methyl cyanide or MeCN; accept CH3CN]
[10e] Recent research in the QuEChERS method has explored using the multi-walled form of these materials as sorbents. These allotropes can be formed by “rolling up” graphene.
ANSWER: carbon nanotubes [or CNTs; accept multi-walled carbon nanotubes or MWNTs]
<KN, Chemistry> | NAFTA-Packet-12
| Heard | PPB | E % | M % | H % |
|---|---|---|---|---|
| 1 | 20.00 | 100% | 100% | 0% |
Conversion
| Team | Opponent | Part 1 | Part 2 | Part 3 | Total | Parts |
|---|---|---|---|---|---|---|
| Muscle Mass Extinction Event | Indiana | 10 | 0 | 10 | 20 | ME |
Summary
| Tournament | Edition | Match | Heard | PPB | E % | M % | H % |
|---|---|---|---|---|---|---|---|
| 2025 NAFTA at Chicago | 11/08/2025 | ✓ | 1 | 20.00 | 100% | 100% | 0% |